| ( | - | 4277 50 | x | − | 599 2500 | ) | ( | 2521 5000 | − | 4661 100 | x | ) | = | 1 |
| 方程左边 = | - | 4277 50 | x | ( | 2521 5000 | − | 4661 100 | x | ) | − | 599 2500 | ( | 2521 5000 | − | 4661 100 | x | ) |
| = | - | 4277 50 | x | × | 2521 5000 | + | 4277 50 | x | × | 4661 100 | x | − | 599 2500 | ( | 2521 5000 | − | 4661 100 | x | ) |
| = | - | 10782317 250000 | x | + | 19935097 5000 | x | x | − | 599 2500 | ( | 2521 5000 | − | 4661 100 | x | ) |
| = | - | 10782317 250000 | x | + | 19935097 5000 | x | x | − | 599 2500 | × | 2521 5000 | + | 599 2500 | × | 4661 100 | x |
| = | - | 10782317 250000 | x | + | 19935097 5000 | x | x | − | 1510079 12500000 | + | 2791939 250000 | x |
| = | - | 3995189 125000 | x | + | 19935097 5000 | x | x | − | 1510079 12500000 |
| - | 3995189 125000 | x | + | 19935097 5000 | x | x | − | 1510079 12500000 | = | 1 |